Question: Could you help me answer the question: The digits 0, 1, 2, 3, 4, 5 and 6 are used at most once each to form

Could you help me answer the question:

"The digits 0, 1, 2, 3, 4, 5 and 6 are used at most once each to form a 3-digit number.

a) How many different numbers can be found?

b) How many of the numbers are divisible by 5?

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